gdb/defs.h

   1 /* Basic, host-specific, and target-specific definitions for GDB.
   2    Copyright (C) 1986, 1989, 1991 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #if !defined (DEFS_H)
  21 #define DEFS_H 1
  22
  23 #include <stdio.h>
  24
  25 /* First include ansidecl.h so we can use the various macro definitions
  26    in all subsequent file inclusions.  FIXME:  This inclusion can now
  27    be removed from all files that include defs.h */
  28
  29 #include "ansidecl.h"
  30
  31 /* We could use the EXFUN macro in ansidecl.h to handle prototypes, but
  32    the name is misleading the the result is ugly.  So just define a simple
  33    macro to handle the parameter lists. */
  34
  35 #ifdef __STDC__
  36 #define PARAMS(paramlist) paramlist
  37 #else
  38 #define PARAMS(paramlist) ()
  39 #endif
  40
  41 /* An address in the program being debugged.  Host byte order.  */
  42 typedef unsigned int CORE_ADDR;
  43
  44 #define min(a, b) ((a) < (b) ? (a) : (b))
  45 #define max(a, b) ((a) > (b) ? (a) : (b))
  46
  47 /* The character C++ uses to build identifiers that must be unique from
  48    the program's identifiers (such as $this and $$vptr).  */
  49 #define CPLUS_MARKER '$'        /* May be overridden to '.' for SysV */
  50
  51 #include <errno.h>              /* System call error return status */
  52
  53 extern int quit_flag;
  54 extern int immediate_quit;
  55
  56 extern void
  57 quit PARAMS ((void));
  58
  59 #define QUIT { if (quit_flag) quit (); }
  60
  61 /* Notes on classes: class_alias is for alias commands which are not
  62    abbreviations of the original command.  */
  63
  64 enum command_class
  65 {
  66   /* Special args to help_list */
  67   all_classes = -2, all_commands = -1,
  68   /* Classes of commands */
  69   no_class = -1, class_run = 0, class_vars, class_stack,
  70   class_files, class_support, class_info, class_breakpoint,
  71   class_alias, class_obscure, class_user
  72 };
  73
  74 /* the cleanup list records things that have to be undone
  75    if an error happens (descriptors to be closed, memory to be freed, etc.)
  76    Each link in the chain records a function to call and an
  77    argument to give it.
  78
  79    Use make_cleanup to add an element to the cleanup chain.
  80    Use do_cleanups to do all cleanup actions back to a given
  81    point in the chain.  Use discard_cleanups to remove cleanups
  82    from the chain back to a given point, not doing them.  */
  83
  84 struct cleanup
  85 {
  86   struct cleanup *next;
  87   void (*function) PARAMS ((PTR));
  88   PTR arg;
  89 };
  90
  91 /* From blockframe.c */
  92
  93 extern int
  94 inside_entry_func PARAMS ((CORE_ADDR));
  95
  96 extern int
  97 inside_entry_file PARAMS ((CORE_ADDR addr));
  98
  99 extern int
 100 inside_main_func PARAMS ((CORE_ADDR pc));
 101
 102 /* From cplus-dem.c */
 103
 104 extern char *
 105 cplus_demangle PARAMS ((const char *, int));
 106
 107 extern char *
 108 cplus_mangle_opname PARAMS ((char *, int));
 109
 110 /* From libmmalloc.a (memory mapped malloc library) */
 111
 112 extern PTR
 113 mmalloc_attach PARAMS ((int, PTR));
 114
 115 extern PTR
 116 mmalloc_detach PARAMS ((PTR));
 117
 118 extern PTR
 119 mmalloc PARAMS ((PTR, long));
 120
 121 extern PTR
 122 mrealloc PARAMS ((PTR, PTR, long));
 123
 124 extern void
 125 mfree PARAMS ((PTR, PTR));
 126
 127 extern int
 128 mmalloc_setkey PARAMS ((PTR, int, PTR));
 129
 130 extern PTR
 131 mmalloc_getkey PARAMS ((PTR, int));
 132
 133 /* From utils.c */
 134
 135 extern char *
 136 demangle_and_match PARAMS ((const char *, const char *, int));
 137
 138 extern int
 139 strcmp_iw PARAMS ((const char *, const char *));
 140
 141 extern char *
 142 safe_strerror PARAMS ((int));
 143
 144 extern char *
 145 safe_strsignal PARAMS ((int));
 146
 147 extern void
 148 init_malloc PARAMS ((PTR));
 149
 150 extern void
 151 request_quit PARAMS ((int));
 152
 153 extern void
 154 do_cleanups PARAMS ((struct cleanup *));
 155
 156 extern void
 157 discard_cleanups PARAMS ((struct cleanup *));
 158
 159 /* The bare make_cleanup function is one of those rare beasts that
 160    takes almost any type of function as the first arg and anything that
 161    will fit in a "void *" as the second arg.
 162
 163    Should be, once all calls and called-functions are cleaned up:
 164 extern struct cleanup *
 165 make_cleanup PARAMS ((void (*function) (PTR), PTR));
 166
 167    Until then, lint and/or various type-checking compiler options will
 168    complain about make_cleanup calls.  It'd be wrong to just cast things,
 169    since the type actually passed when the function is called would be
 170    wrong.  */
 171
 172 extern struct cleanup *
 173 make_cleanup ();
 174
 175 extern struct cleanup *
 176 save_cleanups PARAMS ((void));
 177
 178 extern void
 179 restore_cleanups PARAMS ((struct cleanup *));
 180
 181 extern void
 182 free_current_contents PARAMS ((char **));
 183
 184 extern void
 185 null_cleanup PARAMS ((char **));
 186
 187 extern int
 188 myread PARAMS ((int, char *, int));
 189
 190 extern int
 191 query ();
 192
 193 extern void
 194 wrap_here PARAMS ((char *));
 195
 196 extern void
 197 reinitialize_more_filter PARAMS ((void));
 198
 199 extern int
 200 print_insn PARAMS ((CORE_ADDR, FILE *));
 201
 202 extern void
 203 fputs_filtered PARAMS ((const char *, FILE *));
 204
 205 extern void
 206 puts_filtered PARAMS ((char *));
 207
 208 extern void
 209 fprintf_filtered ();
 210
 211 extern void
 212 printf_filtered ();
 213
 214 extern void
 215 print_spaces PARAMS ((int, FILE *));
 216
 217 extern void
 218 print_spaces_filtered PARAMS ((int, FILE *));
 219
 220 extern char *
 221 n_spaces PARAMS ((int));
 222
 223 extern void
 224 printchar PARAMS ((int, FILE *, int));
 225
 226 extern char *
 227 strdup_demangled PARAMS ((const char *));
 228
 229 extern void
 230 fprint_symbol PARAMS ((FILE *, char *));
 231
 232 extern void
 233 fputs_demangled PARAMS ((char *, FILE *, int));
 234
 235 extern void
 236 perror_with_name PARAMS ((char *));
 237
 238 extern void
 239 print_sys_errmsg PARAMS ((char *, int));
 240
 241 /* From regex.c */
 242
 243 extern char *
 244 re_comp PARAMS ((char *));
 245
 246 /* From symfile.c */
 247
 248 extern void
 249 symbol_file_command PARAMS ((char *, int));
 250
 251 /* From main.c */
 252
 253 extern char *
 254 skip_quoted PARAMS ((char *));
 255
 256 extern char *
 257 gdb_readline PARAMS ((char *));
 258
 259 extern char *
 260 command_line_input PARAMS ((char *, int));
 261
 262 extern void
 263 print_prompt PARAMS ((void));
 264
 265 extern int
 266 batch_mode PARAMS ((void));
 267
 268 extern int
 269 input_from_terminal_p PARAMS ((void));
 270
 271 extern int
 272 catch_errors PARAMS ((int (*) (char *), char *, char *));
 273
 274 /* From printcmd.c */
 275
 276 extern void
 277 set_next_address PARAMS ((CORE_ADDR));
 278
 279 extern void
 280 print_address_symbolic PARAMS ((CORE_ADDR, FILE *, int, char *));
 281
 282 extern void
 283 print_address PARAMS ((CORE_ADDR, FILE *));
 284
 285 /* From source.c */
 286
 287 extern int
 288 openp PARAMS ((char *, int, char *, int, int, char **));
 289
 290 extern void
 291 mod_path PARAMS ((char *, char **));
 292
 293 extern void
 294 directory_command PARAMS ((char *, int));
 295
 296 extern void
 297 init_source_path PARAMS ((void));
 298
 299 /* From findvar.c */
 300
 301 extern int
 302 read_relative_register_raw_bytes PARAMS ((int, char *));
 303
 304 /* From readline (but not in any readline .h files).  */
 305
 306 extern char *
 307 tilde_expand PARAMS ((char *));
 308
 309 /* Structure for saved commands lines
 310    (for breakpoints, defined commands, etc).  */
 311
 312 struct command_line
 313 {
 314   struct command_line *next;
 315   char *line;
 316 };
 317
 318 extern struct command_line *
 319 read_command_lines PARAMS ((void));
 320
 321 extern void
 322 free_command_lines PARAMS ((struct command_line **));
 323
 324 /* String containing the current directory (what getwd would return).  */
 325
 326 extern char *current_directory;
 327
 328 /* Default radixes for input and output.  Only some values supported.  */
 329 extern unsigned input_radix;
 330 extern unsigned output_radix;
 331
 332 /* Baud rate specified for communication with serial target systems.  */
 333 extern char *baud_rate;
 334
 335 /* Languages represented in the symbol table and elsewhere. */
 336
 337 enum language
 338 {
 339    language_unknown,            /* Language not known */
 340    language_auto,               /* Placeholder for automatic setting */
 341    language_c,                  /* C */
 342    language_cplus,              /* C++ */
 343    language_m2                  /* Modula-2 */
 344 };
 345
 346 /* Return a format string for printf that will print a number in the local
 347    (language-specific) hexadecimal format.  Result is static and is
 348    overwritten by the next call.  local_hex_format_custom takes printf
 349    options like "08" or "l" (to produce e.g. %08x or %lx).  */
 350
 351 #define local_hex_format() (current_language->la_hex_format)
 352
 353 extern char *
 354 local_hex_format_custom PARAMS ((char *));      /* language.c */
 355
 356 /* Return a string that contains a number formatted in the local
 357    (language-specific) hexadecimal format.  Result is static and is
 358    overwritten by the next call.  local_hex_string_custom takes printf
 359    options like "08" or "l".  */
 360
 361 extern char *
 362 local_hex_string PARAMS ((int));                /* language.c */
 363
 364 extern char *
 365 local_hex_string_custom PARAMS ((int, char *)); /* language.c */
 366
 367 \f
 368 /* Host machine definition.  This will be a symlink to one of the
 369    xm-*.h files, built by the `configure' script.  */
 370
 371 #include "xm.h"
 372
 373 /* If the xm.h file did not define the mode string used to open the
 374    files, assume that binary files are opened the same way as text
 375    files */
 376 #ifndef FOPEN_RB
 377 #include "fopen-same.h"
 378 #endif
 379
 380 /*
 381  * Allow things in gdb to be declared "const".  If compiling ANSI, it
 382  * just works.  If compiling with gcc but non-ansi, redefine to __const__.
 383  * If non-ansi, non-gcc, then eliminate "const" entirely, making those
 384  * objects be read-write rather than read-only.
 385  */
 386
 387 #ifndef const
 388 #ifndef __STDC__
 389 # ifdef __GNUC__
 390 #  define const __const__
 391 # else
 392 #  define const /*nothing*/
 393 # endif /* GNUC */
 394 #endif /* STDC */
 395 #endif /* const */
 396
 397 #ifndef volatile
 398 #ifndef __STDC__
 399 # ifdef __GNUC__
 400 #  define volatile __volatile__
 401 # else
 402 #  define volatile /*nothing*/
 403 # endif /* GNUC */
 404 #endif /* STDC */
 405 #endif /* volatile */
 406
 407 /* Some compilers (many AT&T SVR4 compilers for instance), do not accept
 408    declarations of functions that never return (exit for instance) as
 409    "volatile void".  For such compilers "NORETURN" can be defined away
 410    to keep them happy */
 411
 412 #ifndef NORETURN
 413 # ifdef __lucid
 414 #   define NORETURN /*nothing*/
 415 # else
 416 #   define NORETURN volatile
 417 # endif
 418 #endif
 419
 420 /* Defaults for system-wide constants (if not defined by xm.h, we fake it).  */
 421
 422 #if !defined (UINT_MAX)
 423 #define UINT_MAX 0xffffffff
 424 #endif
 425
 426 #if !defined (LONG_MAX)
 427 #define LONG_MAX 0x7fffffff
 428 #endif
 429
 430 #if !defined (INT_MAX)
 431 #define INT_MAX 0x7fffffff
 432 #endif
 433
 434 #if !defined (INT_MIN)
 435 /* Two's complement, 32 bit.  */
 436 #define INT_MIN -0x80000000
 437 #endif
 438
 439 /* Number of bits in a char or unsigned char for the target machine.
 440    Just like CHAR_BIT in <limits.h> but describes the target machine.  */
 441 #if !defined (TARGET_CHAR_BIT)
 442 #define TARGET_CHAR_BIT 8
 443 #endif
 444
 445 /* Number of bits in a short or unsigned short for the target machine. */
 446 #if !defined (TARGET_SHORT_BIT)
 447 #define TARGET_SHORT_BIT (sizeof (short) * TARGET_CHAR_BIT)
 448 #endif
 449
 450 /* Number of bits in an int or unsigned int for the target machine. */
 451 #if !defined (TARGET_INT_BIT)
 452 #define TARGET_INT_BIT (sizeof (int) * TARGET_CHAR_BIT)
 453 #endif
 454
 455 /* Number of bits in a long or unsigned long for the target machine. */
 456 #if !defined (TARGET_LONG_BIT)
 457 #define TARGET_LONG_BIT (sizeof (long) * TARGET_CHAR_BIT)
 458 #endif
 459
 460 /* Number of bits in a long long or unsigned long long for the target machine. */
 461 #if !defined (TARGET_LONG_LONG_BIT)
 462 #define TARGET_LONG_LONG_BIT (2 * TARGET_LONG_BIT)
 463 #endif
 464
 465 /* Number of bits in a float for the target machine. */
 466 #if !defined (TARGET_FLOAT_BIT)
 467 #define TARGET_FLOAT_BIT (sizeof (float) * TARGET_CHAR_BIT)
 468 #endif
 469
 470 /* Number of bits in a double for the target machine. */
 471 #if !defined (TARGET_DOUBLE_BIT)
 472 #define TARGET_DOUBLE_BIT (sizeof (double) * TARGET_CHAR_BIT)
 473 #endif
 474
 475 /* Number of bits in a long double for the target machine. */
 476 #if !defined (TARGET_LONG_DOUBLE_BIT)
 477 #define TARGET_LONG_DOUBLE_BIT (2 * TARGET_DOUBLE_BIT)
 478 #endif
 479
 480 /* Number of bits in a "complex" for the target machine. */
 481 #if !defined (TARGET_COMPLEX_BIT)
 482 #define TARGET_COMPLEX_BIT (2 * TARGET_FLOAT_BIT)
 483 #endif
 484
 485 /* Number of bits in a "double complex" for the target machine. */
 486 #if !defined (TARGET_DOUBLE_COMPLEX_BIT)
 487 #define TARGET_DOUBLE_COMPLEX_BIT (2 * TARGET_DOUBLE_BIT)
 488 #endif
 489
 490 /* Number of bits in a pointer for the target machine */
 491 #if !defined (TARGET_PTR_BIT)
 492 #define TARGET_PTR_BIT TARGET_INT_BIT
 493 #endif
 494
 495 /* Convert a LONGEST to an int.  This is used in contexts (e.g. number
 496    of arguments to a function, number in a value history, register
 497    number, etc.) where the value must not be larger than can fit
 498    in an int.  */
 499 #if !defined (longest_to_int)
 500 #if defined (LONG_LONG)
 501 #define longest_to_int(x) (((x) > INT_MAX || (x) < INT_MIN) \
 502                            ? (error ("Value out of range."),0) : (int) (x))
 503 #else /* No LONG_LONG.  */
 504 /* Assume sizeof (int) == sizeof (long).  */
 505 #define longest_to_int(x) ((int) (x))
 506 #endif /* No LONG_LONG.  */
 507 #endif /* No longest_to_int.  */
 508
 509 /* This should not be a typedef, because "unsigned LONGEST" needs
 510    to work. LONG_LONG is defined if the host has "long long".  */
 511
 512 #ifndef LONGEST
 513 # ifdef LONG_LONG
 514 #  define LONGEST long long
 515 # else
 516 #  define LONGEST long
 517 # endif
 518 #endif
 519
 520 /* Assorted functions we can declare, now that const and volatile are
 521    defined.  */
 522
 523 extern char *
 524 savestring PARAMS ((const char *, int));
 525
 526 extern char *
 527 msavestring PARAMS ((void *, const char *, int));
 528
 529 extern char *
 530 strsave PARAMS ((const char *));
 531
 532 extern char *
 533 mstrsave PARAMS ((void *, const char *));
 534
 535 extern char *
 536 concat PARAMS ((char *, ...));
 537
 538 extern PTR
 539 xmalloc PARAMS ((long));
 540
 541 extern PTR
 542 xrealloc PARAMS ((PTR, long));
 543
 544 extern PTR
 545 xmmalloc PARAMS ((PTR, long));
 546
 547 extern PTR
 548 xmrealloc PARAMS ((PTR, PTR, long));
 549
 550 extern PTR
 551 mmalloc PARAMS ((PTR, long));
 552
 553 extern PTR
 554 mrealloc PARAMS ((PTR, PTR, long));
 555
 556 extern void
 557 mfree PARAMS ((PTR, PTR));
 558
 559 extern int
 560 mmcheck PARAMS ((PTR, void (*) (void)));
 561
 562 extern int
 563 mmtrace PARAMS ((void));
 564
 565 extern int
 566 parse_escape PARAMS ((char **));
 567
 568 extern const char * const reg_names[];
 569
 570 extern NORETURN void                    /* Does not return to the caller.  */
 571 error ();
 572
 573 extern NORETURN void                    /* Does not return to the caller.  */
 574 fatal ();
 575
 576 extern NORETURN void                    /* Not specified as volatile in ... */
 577 exit PARAMS ((int));                    /* 4.10.4.3 */
 578
 579 extern NORETURN void                    /* Does not return to the caller.  */
 580 nomem PARAMS ((long));
 581
 582 extern NORETURN void                    /* Does not return to the caller.  */
 583 return_to_top_level PARAMS ((void));
 584
 585 extern void
 586 warning_setup PARAMS ((void));
 587
 588 extern void
 589 warning ();
 590
 591 /* Global functions from other, non-gdb GNU thingies (libiberty for
 592    instance) */
 593
 594 extern char *
 595 basename PARAMS ((char *));
 596
 597 extern char *
 598 getenv PARAMS ((CONST char *));
 599
 600 extern char **
 601 buildargv PARAMS ((char *));
 602
 603 extern void
 604 freeargv PARAMS ((char **));
 605
 606 extern char *
 607 strerrno PARAMS ((int));
 608
 609 extern char *
 610 strsigno PARAMS ((int));
 611
 612 extern int
 613 errno_max PARAMS ((void));
 614
 615 extern int
 616 signo_max PARAMS ((void));
 617
 618 extern int
 619 strtoerrno PARAMS ((char *));
 620
 621 extern int
 622 strtosigno PARAMS ((char *));
 623
 624 extern char *
 625 strsignal PARAMS ((int));
 626
 627 /* From other system libraries */
 628
 629 #ifndef PSIGNAL_IN_SIGNAL_H
 630 extern void
 631 psignal PARAMS ((unsigned, char *));
 632 #endif
 633
 634 /* For now, we can't include <stdlib.h> because it conflicts with
 635    "../include/getopt.h".  (FIXME)
 636
 637    However, if a function is defined in the ANSI C standard and a prototype
 638    for that function is defined and visible in any header file in an ANSI
 639    conforming environment, then that prototype must match the definition in
 640    the ANSI standard.  So we can just duplicate them here without conflict,
 641    since they must be the same in all conforming ANSI environments.  If
 642    these cause problems, then the environment is not ANSI conformant. */
 643
 644 #ifdef __STDC__
 645 #include <stddef.h>
 646 #endif
 647
 648 extern int
 649 fclose PARAMS ((FILE *stream));                         /* 4.9.5.1 */
 650
 651 extern void
 652 perror PARAMS ((const char *));                         /* 4.9.10.4 */
 653
 654 extern double
 655 atof PARAMS ((const char *nptr));                       /* 4.10.1.1 */
 656
 657 #ifndef MALLOC_INCOMPATIBLE
 658
 659 extern PTR
 660 malloc PARAMS ((size_t size));                          /* 4.10.3.3 */
 661
 662 extern PTR
 663 realloc PARAMS ((void *ptr, size_t size));              /* 4.10.3.4 */
 664
 665 extern void
 666 free PARAMS ((void *));                                 /* 4.10.3.2 */
 667
 668 #endif  /* MALLOC_INCOMPATIBLE */
 669
 670 extern void
 671 qsort PARAMS ((void *base, size_t nmemb,                /* 4.10.5.2 */
 672                size_t size,
 673                int (*comp)(const void *, const void *)));
 674
 675 extern char *
 676 strchr PARAMS ((const char *, int));                    /* 4.11.5.2 */
 677
 678 extern char *
 679 strrchr PARAMS ((const char *, int));                   /* 4.11.5.5 */
 680
 681 extern char *
 682 strstr PARAMS ((const char *, const char *));           /* 4.11.5.7 */
 683
 684 extern char *
 685 strtok PARAMS ((char *, const char *));                 /* 4.11.5.8 */
 686
 687 extern char *
 688 strerror PARAMS ((int));                                /* 4.11.6.2 */
 689
 690 /* Various possibilities for alloca.  */
 691 #ifndef alloca
 692 # ifdef __GNUC__
 693 #  define alloca __builtin_alloca
 694 # else
 695 #  ifdef sparc
 696 #   include <alloca.h>
 697 #  endif
 698 #  ifndef alloca                /* May be macro, with args, in <alloca.h> */
 699     extern char *alloca ();
 700 #  endif
 701 # endif
 702 #endif
 703
 704 /* TARGET_BYTE_ORDER and HOST_BYTE_ORDER should be defined to one of these.  */
 705
 706 #if !defined (BIG_ENDIAN)
 707 #define BIG_ENDIAN 4321
 708 #endif
 709
 710 #if !defined (LITTLE_ENDIAN)
 711 #define LITTLE_ENDIAN 1234
 712 #endif
 713
 714 /* Target-system-dependent parameters for GDB.
 715
 716    The standard thing is to include defs.h.  However, files that are
 717    specific to a particular target can define TM_FILE_OVERRIDE before
 718    including defs.h, then can include any particular tm-file they desire.  */
 719
 720 /* Target machine definition.  This will be a symlink to one of the
 721    tm-*.h files, built by the `configure' script.  */
 722
 723 #ifndef TM_FILE_OVERRIDE
 724 #include "tm.h"
 725 #endif
 726
 727 /* The bit byte-order has to do just with numbering of bits in
 728    debugging symbols and such.  Conceptually, it's quite separate
 729    from byte/word byte order.  */
 730
 731 #if !defined (BITS_BIG_ENDIAN)
 732 #if TARGET_BYTE_ORDER == BIG_ENDIAN
 733 #define BITS_BIG_ENDIAN 1
 734 #endif /* Big endian.  */
 735
 736 #if TARGET_BYTE_ORDER == LITTLE_ENDIAN
 737 #define BITS_BIG_ENDIAN 0
 738 #endif /* Little endian.  */
 739 #endif /* BITS_BIG_ENDIAN not defined.  */
 740
 741 /* Swap LEN bytes at BUFFER between target and host byte-order.  */
 742 #if TARGET_BYTE_ORDER == HOST_BYTE_ORDER
 743 #define SWAP_TARGET_AND_HOST(buffer,len)
 744 #else /* Target and host byte order differ.  */
 745 #define SWAP_TARGET_AND_HOST(buffer,len) \
 746   {                                                                      \
 747     char tmp;                                                            \
 748     char *p = (char *)(buffer);                                          \
 749     char *q = ((char *)(buffer)) + len - 1;                              \
 750     for (; p < q; p++, q--)                                              \
 751       {                                                                  \
 752         tmp = *q;                                                        \
 753         *q = *p;                                                         \
 754         *p = tmp;                                                        \
 755       }                                                                  \
 756   }
 757 #endif /* Target and host byte order differ.  */
 758
 759 /* On some machines there are bits in addresses which are not really
 760    part of the address, but are used by the kernel, the hardware, etc.
 761    for special purposes.  ADDR_BITS_REMOVE takes out any such bits
 762    so we get a "real" address such as one would find in a symbol
 763    table.  ADDR_BITS_SET sets those bits the way the system wants
 764    them.  */
 765 #if !defined (ADDR_BITS_REMOVE)
 766 #define ADDR_BITS_REMOVE(addr) (addr)
 767 #define ADDR_BITS_SET(addr) (addr)
 768 #endif /* No ADDR_BITS_REMOVE.  */
 769
 770 /* From valops.c */
 771
 772 extern CORE_ADDR
 773 push_bytes PARAMS ((CORE_ADDR, char *, int));
 774
 775 /* In some modules, we don't have a definition of REGISTER_TYPE yet, so we
 776    must avoid prototyping this function for now.  FIXME.  Should be:
 777 extern CORE_ADDR
 778 push_word PARAMS ((CORE_ADDR, REGISTER_TYPE));
 779  */
 780 extern CORE_ADDR
 781 push_word ();
 782
 783 #endif /* !defined (DEFS_H) */